EP 0620690 A1 19941019 - Video signal encrypting apparatus.
Title (en)
Video signal encrypting apparatus.
Title (de)
Anordnung zur Verschlüsselung eines Videosignals.
Title (fr)
Dispositif de chiffrage d'un signal vidéo.
Publication
Application
Priority
JP 11380493 A 19930415
Abstract (en)
The invention is intended to integrate the means for scrambling (ciphering) the television signal and the means for descrambling the scrambled signal to reproduce the original signal, possessing a memory for storing the key data, in which. when scrambling is instructed by the operation switch, the output of the memory is given to the read address counter through the address generating circuit from the MSB inverting circuit, and scrambling is effected by executing line rotation from the cut point differing in every 1H. When descrambling, reverse processing is effected to decipher. Since circuit blocks for scrambling and descrambling are common, by integrating them, the apparatus is reduced in size, and presented at a lower price.
IPC 1-7
IPC 8 full level
H04N 7/169 (2006.01)
CPC (source: EP US)
H04N 7/1696 (2013.01 - EP US)
Citation (search report)
- [XPAP] EP 0571753 A2 19931201 - MATSUSHITA ELECTRIC IND CO LTD [JP]
- [YA] DE 3927338 A1 19910221 - IND TECHNIK IPS GMBH [DE]
- [Y] US 4547802 A 19851015 - FOGARTY JOHN D [US], et al
- [A] EP 0380181 A1 19900801 - PHILIPS ELECTRONIQUE LAB [FR], et al
- [A] EP 0464562 A2 19920108 - DIGITAL EQUIPMENT CORP [US]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0620690 A1 19941019; EP 0620690 B1 19990127; AU 5945594 A 19941020; AU 676265 B2 19970306; CA 2121446 A1 19941016; CA 2121446 C 20010710; DE 69416183 D1 19990311; DE 69416183 T2 19990610; US 5488658 A 19960130
DOCDB simple family (application)
EP 94302618 A 19940413; AU 5945594 A 19940415; CA 2121446 A 19940415; DE 69416183 T 19940413; US 22822094 A 19940415